feat(third_party/bazel): Check in rules_haskell from Tweag

third_party/bazel/rules_haskell/tests/unit-tests/tests.bzl

@@ -0,0 +1,83 @@
+load(
+    "@bazel_skylib//lib:unittest.bzl",
+    "asserts",
+    unit = "unittest",
+)
+load("//haskell:private/actions/link.bzl", "create_rpath_entry", "parent_dir_path")
+load("//haskell:private/list.bzl", "list")
+
+def parent_dir_path_test_impl(ctx):
+    env = unit.begin(ctx)
+    asserts.equals(
+        env,
+        expected = ctx.attr.output,
+        actual = parent_dir_path(ctx.attr.filename),
+    )
+    unit.end(env)
+
+parent_dir_path_test = unit.make(
+    parent_dir_path_test_impl,
+    attrs = {
+        "filename": attr.string(),
+        "output": attr.string_list(),
+    },
+)
+
+def create_rpath_entry_test_impl(ctx):
+    env = unit.begin(ctx)
+    asserts.equals(
+        env,
+        expected = ctx.attr.output,
+        actual = create_rpath_entry(
+            struct(
+                short_path = ctx.attr.binary_short_path,
+            ),
+            struct(
+                short_path = ctx.attr.dependency_short_path,
+            ),
+            keep_filename = ctx.attr.keep_filename,
+            prefix = ctx.attr.prefix,
+        ),
+    )
+    unit.end(env)
+
+create_rpath_entry_test = unit.make(
+    create_rpath_entry_test_impl,
+    attrs = {
+        "binary_short_path": attr.string(),
+        "dependency_short_path": attr.string(),
+        "keep_filename": attr.bool(default = False, mandatory = False),
+        "prefix": attr.string(default = "", mandatory = False),
+        "output": attr.string(),
+    },
+)
+
+def compare_x(el):
+    return el.x
+
+def dedup_on_test_impl(ctx):
+    env = unit.begin(ctx)
+    asserts.equals(
+        env,
+        expected = [],
+        actual = list.dedup_on(compare_x, []),
+    )
+    asserts.equals(
+        env,
+        expected = [struct(x = 3)],
+        actual = list.dedup_on(
+            compare_x,
+            [struct(x = 3), struct(x = 3), struct(x = 3)],
+        ),
+    )
+    asserts.equals(
+        env,
+        expected = [struct(x = 3), struct(x = 4), struct(x = 5)],
+        actual = list.dedup_on(
+            compare_x,
+            [struct(x = 3), struct(x = 4), struct(x = 3), struct(x = 5), struct(x = 3)],
+        ),
+    )
+    unit.end(env)
+
+dedup_on_test = unit.make(dedup_on_test_impl)